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4
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1 ;;; iso-acc.el --- minor mode providing electric accent keys
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2
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3 ;; Copyright (C) 1993, 1994, 1996 Free Software Foundation, Inc.
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4
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5 ;; Author: Johan Vromans <jv@mh.nl>
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88
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6 ;; Version: 1.8
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70
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7 ;; Maintainer: FSF
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8 ;; Keywords: i18n
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88
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9 ;; Adapted to XEmacs 19.14 by Alexandre Oliva <oliva@dcc.unicamp.br>
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10 ;; Last update: Jan 25, 1997
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4
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11
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12 ;; This file is part of GNU Emacs.
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13
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14 ;; GNU Emacs is free software; you can redistribute it and/or modify
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15 ;; it under the terms of the GNU General Public License as published by
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16 ;; the Free Software Foundation; either version 2, or (at your option)
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17 ;; any later version.
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18
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19 ;; GNU Emacs is distributed in the hope that it will be useful,
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20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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22 ;; GNU General Public License for more details.
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23
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24 ;; You should have received a copy of the GNU General Public License
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25 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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26 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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27 ;; Boston, MA 02111-1307, USA.
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28
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29 ;;; Commentary:
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30
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31 ;; Function `iso-accents-mode' activates a minor mode in which
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32 ;; typewriter "dead keys" are emulated. The purpose of this emulation
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33 ;; is to provide a simple means for inserting accented characters
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34 ;; according to the ISO-8859-1 character set.
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35 ;;
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36 ;; In `iso-accents-mode', pseudo accent characters are used to
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37 ;; introduce accented keys. The pseudo-accent characters are:
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38 ;;
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39 ;; ' (minute) -> grave accent
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40 ;; ` (backtick) -> acute accent
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41 ;; " (second) -> diaeresis
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42 ;; ^ (caret) -> circumflex
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43 ;; ~ (tilde) -> tilde over the character
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70
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44 ;; / (slash) -> slash through the character.
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45 ;; , (cedilla) -> cedilla under the character (except on default mode).
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46 ;; Also: /A is A-with-ring and /E is AE ligature.
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47 ;;
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48 ;; The action taken depends on the key that follows the pseudo accent.
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49 ;; In general:
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50 ;;
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51 ;; pseudo-accent + appropriate letter -> accented letter
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70
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52 ;; pseudo-accent + space -> pseudo-accent (except for comma)
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53 ;; pseudo-accent + pseudo-accent -> accent (if available)
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54 ;; pseudo-accent + other -> pseudo-accent + other
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55 ;;
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56 ;; If the pseudo-accent is followed by anything else than a
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57 ;; self-insert-command, the dead-key code is terminated, the
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58 ;; pseudo-accent inserted 'as is' and the bell is rung to signal this.
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59 ;;
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60 ;; Function `iso-accents-mode' can be used to enable the iso accents
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61 ;; minor mode, or disable it.
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62
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63 ;; If you want only some of these characters to serve as accents,
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64 ;; add a language to `iso-languages' which specifies the accent characters
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65 ;; that you want, then select the language with `iso-accents-customize'.
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66
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67 ;;; Code:
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68
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69 (provide 'iso-acc)
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70
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71 ;; needed for compatibility with XEmacs 19.14
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72 (if (fboundp 'read-event) ()
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73 (defun read-event () (event-key (next-command-event))))
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74
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70
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75 ;; needed to work on GNU Emacs (had to use this function on XEmacs)
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76 (if (fboundp 'character-to-event) ()
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88
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77 (defun character-to-event (ch &optional event console meta)
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78 (if (listp ch) (car ch) ch)))
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79
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80 ;; needed for compatibility with XEmacs 19.14 and GNU Emacs 19.30
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81 (if (fboundp 'this-single-command-keys) ()
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82 (if (string-match "Lucid" (version))
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83 (defun this-single-command-keys ()
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84 (setq this-command (not (this-command-keys)))
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85 (this-command-keys))
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86 (defun this-single-command-keys () (this-command-keys))))
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87
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88 (defvar iso-languages
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89 '(("portuguese"
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90 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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91 (?C . ?\307) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
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92 (?u . ?\372) (?c . ?\347) (?\ . ?') (space . ?'))
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93 (?` (?A . ?\300) (?a . ?\340) (?\ . ?`) (space . ?`))
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94 (?^ (?A . ?\302) (?E . ?\312) (?O . ?\324) (?a . ?\342) (?e . ?\352)
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95 (?o . ?\364) (?\ . ?^) (space . ?^))
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96 (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\") (space . ?\"))
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97 (?\~ (?A . ?\303) (?O . ?\325) (?a . ?\343) (?o . ?\365) (?\ . ?\~) (space . ?\~))
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98 (?, (?c . ?\347) (?C . ?\307)))
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99
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100 ("irish"
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101 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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102 (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363) (?u . ?\372)
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103 (?\ . ?') (space . ?')))
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104
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105 ("french"
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70
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106 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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107 (?C . ?\307) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
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108 (?u . ?\372) (?c . ?\347) (?\ . ?') (space . ?'))
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109 (?` (?A . ?\300) (?E . ?\310) (?a . ?\340) (?e . ?\350) (?\ . ?`) (space . ?`))
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110 (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
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111 (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
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112 (?\ . ?^) (space . ?^))
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113 (?\" (?U . ?\334) (?u . ?\374) (?\ . ?\") (space . ?\"))
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114 (?\~ (?A . ?\303) (?O . ?\325) (?a . ?\343) (?o . ?\365) (?\ . ?\~) (space . ?\~))
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115 (?, (?c . ?\347) (?C . ?\307)))
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116
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117 ("latin-2"
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118 (?' (?A . ?\301) (?C . ?\306) (?D . ?\320) (?E . ?\311) (?I . ?\315)
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119 (?L . ?\305) (?N . ?\321) (?O . ?\323) (?R . ?\300) (?S . ?\246)
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120 (?U . ?\332) (?Y . ?\335) (?Z . ?\254) (?a . ?\341) (?c . ?\346)
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121 (?d . ?\360) (?e . ?\351) (?i . ?\355) (?l . ?\345) (?n . ?\361)
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122 (?o . ?\363) (?r . ?\340) (?s . ?\266) (?u . ?\372) (?y . ?\375)
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123 (?z . ?\274) (?' . ?\264) (?\ . ?') (space . ?'))
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124 (?` (?A . ?\241) (?C . ?\307) (?E . ?\312) (?L . ?\243) (?S . ?\252)
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125 (?T . ?\336) (?Z . ?\257) (?a . ?\261) (?l . ?\263) (?c . ?\347)
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126 (?e . ?\352) (?s . ?\272) (?t . ?\376) (?z . ?\277) (?` . ?\252)
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127 (?. . ?\377) (?\ . ?`) (space . ?`))
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128 (?^ (?A . ?\302) (?O . ?\324) (?a . ?\342) (?o . ?\364)
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129 (?^ . ?^) ; no special code?
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130 (?\ . ?^) (space . ?^))
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131 (?\" (?A . ?\304) (?E . ?\313) (?O . ?\326) (?U . ?\334) (?a . ?\344)
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132 (?e . ?\353) (?o . ?\366) (?s . ?\337) (?u . ?\374) (?\" . ?\250)
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133 (?\ . ?\") (space . ?\"))
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134 (?\~ (?A . ?\303) (?C . ?\310) (?D . ?\317) (?L . ?\245) (?N . ?\322)
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135 (?O . ?\325) (?R . ?\330) (?S . ?\251) (?T . ?\253) (?U . ?\333)
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136 (?Z . ?\256) (?a . ?\323) (?c . ?\350) (?d . ?\357) (?l . ?\265)
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137 (?n . ?\362) (?o . ?\365) (?r . ?\370) (?s . ?\271) (?t . ?\273)
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138 (?u . ?\373) (?z . ?\276)
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139 (?v . ?\242) ; v accent
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140 (?\~ . ?\242) ; v accent
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141 (?\. . ?\270) ; cedilla accent
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142 (?\ . ?\~) (space . ?\~)))
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143
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144 ("latin-1"
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145 (?' (?A . ?\301) (?E . ?\311) (?I . ?\315) (?O . ?\323) (?U . ?\332)
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146 (?Y . ?\335) (?a . ?\341) (?e . ?\351) (?i . ?\355) (?o . ?\363)
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147 (?u . ?\372) (?y . ?\375) (?' . ?\264) (?\ . ?') (space . ?'))
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148 (?` (?A . ?\300) (?E . ?\310) (?I . ?\314) (?O . ?\322) (?U . ?\331)
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149 (?a . ?\340) (?e . ?\350) (?i . ?\354) (?o . ?\362) (?u . ?\371)
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150 (?` . ?`) (?\ . ?`) (space . ?`))
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151 (?^ (?A . ?\302) (?E . ?\312) (?I . ?\316) (?O . ?\324) (?U . ?\333)
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152 (?a . ?\342) (?e . ?\352) (?i . ?\356) (?o . ?\364) (?u . ?\373)
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153 (?^ . ?^) (?\ . ?^) (space . ?^))
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154 (?\" (?A . ?\304) (?E . ?\313) (?I . ?\317) (?O . ?\326) (?U . ?\334)
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155 (?a . ?\344) (?e . ?\353) (?i . ?\357) (?o . ?\366) (?s . ?\337)
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156 (?u . ?\374) (?y . ?\377) (?\" . ?\250) (?\ . ?\") (space . ?\"))
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157 (?\~ (?A . ?\303) (?C . ?\307) (?D . ?\320) (?N . ?\321) (?O . ?\325)
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158 (?T . ?\336) (?a . ?\343) (?c . ?\347) (?d . ?\360) (?n . ?\361)
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159 (?o . ?\365) (?t . ?\376) (?> . ?\273) (?< . ?\253) (?\~ . ?\270)
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160 (?! . ?\241) (?? . ?\277)
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161 (?\ . ?\~) (space . ?\~))
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162 (?\/ (?A . ?\305) (?E . ?\306) (?O . ?\330) (?a . ?\345) (?e . ?\346)
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163 (?o . ?\370) (?\/ . ?\260) (?\ . ?\/) (space . ?\/))))
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164 "List of language-specific customizations for the ISO Accents mode.
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165
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166 Each element of the list is of the form
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167
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168 (LANGUAGE
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169 (PSEUDO-ACCENT MAPPINGS)
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170 (PSEUDO-ACCENT MAPPINGS)
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171 ...)
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172
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173 LANGUAGE is a string naming the language.
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174 PSEUDO-ACCENT is a char specifying an accent key.
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175 MAPPINGS are cons cells of the form (CHAR . ISO-CHAR).
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176
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177 The net effect is that the key sequence PSEUDO-ACCENT CHAR is mapped
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178 to ISO-CHAR on input.")
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179
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180 (defvar iso-language nil
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181 "Language for which ISO Accents mode is currently customized.
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182 Change it with the `iso-accents-customize' function.")
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183
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184 (defvar iso-accents-list nil
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185 "Association list for ISO accent combinations, for the chosen language.")
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186
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187 (defvar iso-accents-mode nil
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188 "*Non-nil enables ISO Accents mode.
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189 Setting this variable makes it local to the current buffer.
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190 See the function `iso-accents-mode'.")
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191 (make-variable-buffer-local 'iso-accents-mode)
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192
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193 (defvar iso-accents-enable '(?' ?` ?^ ?\" ?~ ?/ ?,)
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194 "*List of accent keys that become prefixes in ISO Accents mode.
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195 The default is (?' ?` ?^ ?\" ?~ ?/ ?,), which contains all the supported
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196 accent keys. If you set this variable to a list in which some of those
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197 characters are missing, the missing ones do not act as accents.
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198
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199 Note that if you specify a language with `iso-accents-customize',
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200 that can also turn off certain prefixes (whichever ones are not needed in
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201 the language you choose).")
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202
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203 (defun iso-accents-accent-key (prompt)
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204 "Modify the following character by adding an accent to it."
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205 ;; Pick up the accent character.
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206 (if (and iso-accents-mode
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207 (memq last-input-char iso-accents-enable))
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208 (iso-accents-compose prompt)
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209 (char-to-string last-input-char)))
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210
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211 (defun iso-accents-compose (prompt)
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212 (let* ((first-char last-input-char)
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213 (list (assq first-char iso-accents-list))
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214 ;; Wait for the second key and look up the combination.
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215 (second-char (if (or prompt
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216 (not (eq (key-binding "a")
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217 'self-insert-command))
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218 ;; Not at start of a key sequence.
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219 (> (length (this-single-command-keys)) 1)
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220 ;; Called from anything but the command loop.
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221 this-command)
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222 (progn
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223 (message "%s%c"
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224 (or prompt "Compose with ")
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225 first-char)
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226 (read-event))
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227 (insert first-char)
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228 (prog1 (read-event)
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229 (delete-region (1- (point)) (point)))))
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230 (entry (cdr (assq second-char list))))
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231 (if entry
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232 ;; Found it: insert the accented character and
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233 ;; return a do-nothing key
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234 (vector (character-to-event (list entry)))
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235 ;; Otherwise, advance and schedule the second key for execution.
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88
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236 (setq unread-command-events (append
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237 (list
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238 (character-to-event (list second-char)))
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239 unread-command-events))
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240 (vector (character-to-event (list first-char))))))
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241
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242 ;; It is a matter of taste if you want the minor mode indicated
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243 ;; in the mode line...
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244 ;; If so, uncomment the next four lines.
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245 ;; (or (assq 'iso-accents-mode minor-mode-alist)
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246 ;; (setq minor-mode-alist
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247 ;; (append minor-mode-alist
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248 ;; '((iso-accents-mode " ISO-Acc")))))
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249
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250 ;;;###autoload
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251 (defun iso-accents-mode (&optional arg)
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252 "Toggle ISO Accents mode, in which accents modify the following letter.
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253 This permits easy insertion of accented characters according to ISO-8859-1.
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254 When Iso-accents mode is enabled, accent character keys
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255 \(`, ', \", ^, / and ~) do not self-insert; instead, they modify the following
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256 letter key so that it inserts an ISO accented letter.
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257
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258 You can customize ISO Accents mode to a particular language
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259 with the command `iso-accents-customize'.
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260
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261 Special combinations: ~c gives a c with cedilla,
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262 ~d gives an Icelandic eth (d with dash).
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263 ~t gives an Icelandic thorn.
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264 \"s gives German sharp s.
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265 /a gives a with ring.
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266 /e gives an a-e ligature.
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267 ~< and ~> give guillemots.
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268 ~! gives an inverted exclamation mark.
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269 ~? gives an inverted question mark.
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270
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271 With an argument, a positive argument enables ISO Accents mode,
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272 and a negative argument disables it."
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273
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274 (interactive "P")
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275
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276 (if (if arg
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277 ;; Negative arg means switch it off.
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278 (<= (prefix-numeric-value arg) 0)
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279 ;; No arg means toggle.
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280 iso-accents-mode)
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281 (setq iso-accents-mode nil)
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282
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283 ;; Enable electric accents.
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284 (setq iso-accents-mode t)))
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285
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88
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286 (defvar iso-accents-mode-map nil)
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287
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288 (defun iso-accents-customize (language)
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289 "Customize the ISO accents machinery for a particular language.
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290 It selects the customization based on the specifications in the
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291 `iso-languages' variable."
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292 (interactive (list (completing-read "Language: " iso-languages nil t)))
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88
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293 (let ((table (assoc language iso-languages)) tail acc)
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294 (if (not table)
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295 (error "Unknown language '%s'" language)
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296 (setq iso-language language
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297 iso-accents-list (cdr table))
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298 (if key-translation-map
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299 (substitute-key-definition
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300 'iso-accents-accent-key nil key-translation-map)
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301 (setq key-translation-map (make-sparse-keymap)))
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88
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302 (setq iso-accents-mode-map (make-sparse-keymap))
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303 (let ((pair (assoc 'iso-accents-mode minor-mode-map-alist)))
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304 (if pair
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305 (setcdr pair iso-accents-mode-map)
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306 (let ((l minor-mode-map-alist))
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307 (while (cdr l)
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308 (setq l (cdr l)))
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309 (setcdr l (list (cons 'iso-accents-mode iso-accents-mode-map))))))
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4
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310 ;; Set up translations for all the characters that are used as
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311 ;; accent prefixes in this language.
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312 (setq tail iso-accents-list)
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313 (while tail
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88
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314 (define-key key-translation-map
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315 (vector (character-to-event (list (car (car tail)))))
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4
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316 'iso-accents-accent-key)
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88
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317 (setq acc (cdr (car tail)))
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318 (while acc
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319 (define-key iso-accents-mode-map
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320 (vector (character-to-event (list (cdr (car acc)))))
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321 'iso-accents-self-insert-unless-redefined)
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322 (setq acc (cdr acc)))
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4
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323 (setq tail (cdr tail))))))
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324
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88
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325 (defun iso-accents-self-insert-unless-redefined (prompt)
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326 "Temporarily disables iso-accents-mode, and checks for additional bindings of the keys that produced its invocation. If no such binding is found, 'self-insert-command is returned"
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327 (interactive "p")
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328 (let* ((iso-accents-mode nil)
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329 (bind (key-binding (this-command-keys)))
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330 (repeat t) result)
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331 (while repeat
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332 (setq result
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333 (cond ((or (null bind)
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334 (eq bind 'self-insert-command))
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335 (setq repeat nil)
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336 (self-insert-command prompt))
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337 ((commandp bind)
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338 (setq repeat nil)
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339 (call-interactively bind))
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340 ((or (stringp bind)
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341 (keymapp bind))
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342 (setq repeat nil)
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343 bind)
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344 ((and (consp bind)
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345 (stringp (car bind)))
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346 (setq bind (cdr bind)))
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347 ((and (consp bind)
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348 (keymapp (car bind)))
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349 (setq bind (lookup-key (car bind) (cdr bind))))
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350 (t (error "Invalid key binding")))))
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351 result))
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352
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4
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353 (defun iso-accentuate (start end)
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354 "Convert two-character sequences in region into accented characters.
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355 Noninteractively, this operates on text from START to END.
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356 This uses the same conversion that ISO Accents mode uses for type-in."
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357 (interactive "r")
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358 (save-excursion
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359 (save-restriction
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360 (narrow-to-region start end)
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361 (goto-char start)
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362 (forward-char 1)
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363 (let (entry)
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364 (while (< (point) end)
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365 (if (and (memq (preceding-char) iso-accents-enable)
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366 (setq entry (cdr (assq (following-char) (assq (preceding-char) iso-accents-list)))))
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367 (progn
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368 (forward-char -1)
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369 (delete-char 2)
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370 (insert entry)
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371 (setq end (1- end)))
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372 (forward-char 1)))))))
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373
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374 (defun iso-accent-rassoc-unit (value alist)
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375 (let (elt acc)
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376 (while (and alist (not elt))
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377 (setq acc (car (car alist))
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378 elt (car (rassq value (cdr (car alist))))
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379 alist (cdr alist)))
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380 (if elt
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381 (cons acc elt))))
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382
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383 (defun iso-unaccentuate (start end)
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384 "Convert accented characters in the region into two-character sequences.
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385 Noninteractively, this operates on text from START to END.
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386 This uses the opposite of the conversion done by ISO Accents mode for type-in."
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387 (interactive "r")
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388 (save-excursion
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389 (save-restriction
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390 (narrow-to-region start end)
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391 (goto-char start)
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392 (let (entry)
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393 (while (< (point) end)
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394 (if (and (> (following-char) 127)
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395 (setq entry (iso-accent-rassoc-unit (following-char)
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396 iso-accents-list)))
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397 (progn
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398 (delete-char 1)
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399 (insert (car entry) (cdr entry))
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400 (setq end (1+ end)))
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401 (forward-char 1)))))))
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402
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403 (defun iso-deaccentuate (start end)
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404 "Convert accented characters in the region into unaccented characters.
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405 Noninteractively, this operates on text from START to END."
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406 (interactive "r")
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407 (save-excursion
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408 (save-restriction
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409 (narrow-to-region start end)
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410 (goto-char start)
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411 (let (entry)
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412 (while (< (point) end)
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413 (if (and (> (following-char) 127)
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414 (setq entry (iso-accent-rassoc-unit (following-char)
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415 iso-accents-list)))
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416 (progn
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417 (delete-char 1)
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418 (insert (cdr entry)))
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419 (forward-char 1)))))))
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420
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421 ;; Set up the default settings.
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422 (iso-accents-customize "latin-1")
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423
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424 ;; Use Iso-Accents mode in the minibuffer
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425 ;; if it was in use in the previous buffer.
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426 (defun iso-acc-minibuf-setup ()
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427 (setq iso-accents-mode
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428 (save-excursion
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429 (set-buffer (window-buffer minibuffer-scroll-window))
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430 iso-accents-mode)))
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431
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432 (add-hook 'minibuf-setup-hook 'iso-acc-minibuf-setup)
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433
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434 ;;; iso-acc.el ends here
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